The paper analyzes existing state of innovation system in the field of public infrastructure construction in China and elaborates on the duty and role of owner in establishment of a technical innovation system with enterprise as the main body following the process of productioneducationresearch. This paper also claims that the key project construction is an important resource to enhance national capability of innovation and accordingly puts forward an effective approach to cultivate the core competitiveness of leading enterprises on the basis of practice in the Sutong Bridge project.